Outcome
The outcome of an ankle replacement includes factors like ankle function, pain, revision and implant survival. Outcome studies on modern designs show a five-year implant survival rate between 67% and 94%. and ten-year survival rates around 75%. Mobile bearing designs have enabled implant survival rates to continue to improve, reaching as high as 95% for five years and 90% for ten years.
Clinical ankle scores, such as the American Orthopaedcic Foot and Ankle Society (AOFAS) is an outcome rating system for ankle replacements. It is composed of the parameters pain (max 40 points), function (max 50 points) and alignment (max 10 points). Further outcome instruments include radiographic assessment of component stability and migration, and the assessment of its functionality in daily life using gait analysis or videofluoroscopy; the latter is a tool for three-dimensional measuring of the position and orientation of implanted prosthetic components at the replaced joints.
Read more about this topic: Ankle Replacement
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